Window fixture



' Aug. 23,1927;

1,640,143 L. A. CORCORAN wnmow FIXTURE 7 Filed April 25, 1925 J F a;

Patented Aug. 23, 1927.

UNITED STA ES PATENT OFFICE.

LOUIS A. CORCORAN, OF INDIANAPOLIS, INDIANA ASSIGNOR T STANLEY BARNES,

0F INDIANAPOLIS, INDIAHA.

I WINDOW FIXTURE.

Application filed April 25, 1925. Serial No. 25,909.

This invention relates to windows of the sliding sash type and has for its object to provide a window-sash fixture adapted for cooperation with the window frame to resist movement of the sash in the frame to an extent sufiicient to obviate the use of sashcords and weights the particular object of the invention being to provide a device of this character, which includes a spring-held member and a compression spring associated therewith, wherein the pressure exerted by the spring may be adjusted without removing the fixture from the sash and without 1ncreasing the cost of manufacture of the device. c

A Suitable embodiment of the invention is illustrated in the accompanying drawings wherein:-

Figure 1 is a view in elevation, partly in section, of a conventional sliding-sash win dow, the sashes of which are provided with devices constructed in accordance with the invention; H

Fig. 2 is a fragmentary side-edge view in elevation of that portion of one of the sashes which is equipped with a device embodying the invention,

Fig. 3 is a fragmentary sectional view on the line 3-3 of Fig. 2.

Fig. 4-is a fragmentary detail section similar to Fig. 3 showing the adjusting bolt devoid of surface formations or corrugations of the shank thereof shown in Figs. 3, 5 and 6;

Fig. 5 is a detail section on the line 55 of Fig. 3; and

Fig. 6 is a perspective view of the springadjusting screw shown in Figs. 3 and 5.

The device comprises the plate 1 adapted to be secured by means of screws 2 to a side edge of the sliding-sash 3 which i recessed to receivethe same. The plate 1 is provided with a central counter-sunk opening to receive the spring-adjusting bolt 4 of the fiathead type and the two rectangular openings 5 at the opposite sides of said central opening through which the rollers 6 of the spring-held carrier 7 are adapted to project.

Said carrier 7 consists of a channeled strip of suitable sheet metal, the side flanges 8 of which are provided at their ends with .pro jections 9 in which the shafts or pintles 10 of the rollers 7 are engaged at their ends.

Disposed upon thethreaded shank of the spring adjusting bolt 4, which passes freely through a central opening in the web of the channeled strip or. carrier 7 is a polygonal nut 11, which is preferably square. Mounted loosely on the shank of the bolt 4 and bearing at opposite ends upon the web or strip 7 and said nut 11 respectively is a helical compression spring 12 which may be rendered normally compressed to any desired extent by adjusting the nut relatively to the web or strip 7.

The structure as above described is old and well-known. It operates to cause the rollers to bear with considerable pressure against the window-frame when the sash is forced into place in the latter against the actionof the springs 12 there being at least one of said devices disposed in each of the side-rails of the sash.

It will be obvious that a fixture as above described and not including the improve ment of my invention as hereinafter described, will not readily permit of adjustment of the pressure exerted by the spring 12 without first removing from the sash. a

My invention is confined to the provision of means whereby the adjustment of the pressure exerted by thespring 12 may be accomplished without bodily removing the device from the sash but by merely rotating the bolt 4. v a i This is accomplished by providing the spring 12 at opposite ends with projections 13 and 14 respectively the former of which is disposed in the path of the corners of the nut 11 and the latter of which engages in a perforation in the web or carrier 7 adjacent the central opening through which the shank of the bolt 4 freely passes. The spring 12 is thus held against rotation relatively to the carrier 7 and the projection 13 holds the nut 11 against rotation relatively to said carrier so that. by merely rotating the screw 4 the nut 11 is caused to approach or recede from the carrier 7 and thus adjusts the pressure exerted by the spring.

In the operation of raising and lowering the window sashes, there will be more or less movement of the carrier 7 relatively to the plate 1 against the action of the spring 12 and this movement is apt to cause a gradual rotation of the screw 4 in the direction (anti-clockwise) to eflect a movethe device bodily ment of the nut toward the free end of the shank, thereby gradually decreasing the pressure exerted by the spring 12.

To prevent this, the smooth portion of the shank of the screw portion and the head, may be provided with a series of longitudinal recesses 15 and the projection 14 of the spring 12 bent so that its free end 16 portion normally engages in one of said recesses 15 to thus prevent rotation of said screw 4 except by means of a suitable tool.

The foregoing arrangement of the spring and its projections 13 and 14 constitutes a very eflicient means for preventing rotation of the nut 11 with the screw 4 when it is desired to increase the pressure exerted by the spring, while the recesses 15 of the screw and free end 16 of the projection 14 of the spring, if employed, will serve to effectively prevent rotation of the bolt under the influence of motion of the carrier 7 during operation of the sashes.

Obviously, the invention, as above described, may be embodied in devices other than sash fixtures, and, in fact, in almost every structure wherein an adjustable helical spring is associated with a bolt, it being understood, of course, that the invention is not limited to devices of the type shown and described, its embodiment in the latter being merely exemplary of an instance where it is very advantageously employed.

I claim as my invention 1. An inaccessible spring tensioning means comprising an abutment element, a bolt having its shank extending. therethrough and forwardly and rearwardly thereof, a spring mounted on said shank rearwardly of said element, the forward terminal portion of said spring engaging in said element to hold the spring from rotation, a polygonal shaped nut mounted on said shank rearwardly of said between the threaded spring, and a projection carried by the rear end of the spring and engaging one side ofthe nut to prevent rotation of the latter relative to the spring; the said forward terminal portion of said spring associating with said shank forwardly of said element for preventing accidental, while permitting forced, rotation of the bolt relative to the spring and nut.

2. An inaccessible spring tensioning means comprising an abutment element, a bolt having its shank extending therethrough and forwardly and rearwardly thereof, a spring mounted on said shank rearwardly of said element, the forward terminal portion of said spring engaging in said element to hold the spring from rotation, a polygonal shaped nut mounted on said shank rearwardly of said spring, and a projection carried by the rear end of the spring and engaging one side of the nut to prevent rotation of the latter relative to the spring, said shank forwardly of said element formed with periph eral spaced recesses associating with the forward terminal portion of the spring for preventing accidental, while permitting forced, rotation of the bolt relat-iveto the spring and nut.

3. In a device of the class described, the

combination of a supporting plate, a bolt carried by said supporting plate, a member axially movable on said bolt, rollers carried by said member on opposite sides of said bolt, said supporting plate being provided with openings into and through which said rollers may extend, a nut on said bolt, a

spring acting between said nut andsaid member and tending to force said member toward said plate, and means tending to prevent rotation of said bolt.

In testimony whereof, I have hereunto set my hand, this 27th day of April, 1925.

LOUIS A. CORCOR-AN. 

